EP0462961B2 - Apparatus for bending hollow spaces frames - Google Patents

Abstract

An apparatus for bending hollow profile strips (1) into spacer frames for insulating glass planes includes a clamp for the hollow profile strip, which clamp can be brought into contact with the lateral surfaces of the hollow profile strip (1), an abutment (20), about which the hollow profile strip (1) is bent, and a pivotable bending lever (50). The abutment (20) is exchangeably attached to a support (21) and can be moved into and out of its operative position by pivoting the support (21) about an axis perpendicular to the plane of symmetry of the clamp (2) and by shifting the support (21) perpendicularly to the plane of symmetry of the clamp (2).

Description

The invention relates to a Device for bending hollow profile strips to spacer frame for insulating glass panes with the Features of the introductory part of claim 1, as from the DE 32 31 698 A1 is known.

Such bending devices, in part as possible sharp-edged bends in the hollow profile strips are intended to result in different embodiments known. For example, on the DE-PS 32 23 881, DE-GM 87 05 796 or the US-PS 4,836,005.

Made in one piece with bent corners Spacer frames and devices for manufacturing the same are from FR-PS 2 449 222 and DE-OS 32 21 986 known. At the out DE-OS 3 221 986 known device is one Guide provided, on which the hollow profile bar rests, to bend the to a spacer frame is, at least in the area of the bending head of guided below and supported only from one side becomes. Opposite the guide is a counterhold provided that on a pivotable Arm operated by a cylinder is mounted. This counter holder has the known Device both the function of a counterhold, as well as that of a clamping element, so that special Clamping devices for the to be bent Hollow profile strips are not required.

In the known device, the counter holder by actuating the working cylinder only in a part-circular arc in his or from its a hollow profile strip against the Leading exciting active position flexible.

Finally, DE-OS 33 12 764 refer from empty it is known; Hollow profile strips to bend to spacers for insulating glass panes, in the area of the bending point from the inside against the hollow profile bar can be created mandrel. The bending is done by swiveling a jaw, with the other end of the profile bar between one movable jaw and one from the inside abutment abutting the profile strip becomes.

A problem with the known bending devices is that for use with insulating glass panes required sharp-edged turns cannot always be easily reached because partly there is a risk that the walls of the hollow profile strip tear during the bending process and the side surfaces the hollow profile strips in the corner area, i.e. not always flat where they have been bent run, but have corrugations that the subsequent processing of the spacer frame, especially the coating of the side surfaces The spacer frame with sealant or adhesive complicate and hinder.

In EP-A-318 748 a device for Bending hollow profile strips to spacer frames described, the abutment mounted movably is and during the bending process Carry out swivel and / or shift movement should. The pivot movement of the abutment follows the movement of the bending lever that is about to turn Hollow profile attacks from the outside. Thereby should be achieved that the inner wall of the hollow profile during the bending movement inwards moved and finally on the also by the Pressure roller rests on the inner wall deformed. 6 of EP-A-318 748 Control curve can be provided which the abutment additionally in during its pivoting movement Moved in the direction of its longitudinal extent.

The device described in DE-OS 29 23 769 for bending hollow profile strips tool that can be pushed in during the bending process, through which the web of a longitudinal section of a Spacer strip at the highest point the bend deformed during the bending process shall be. In DE-OS 29 23 769 is express pointed out that the "counter bearing tool" during the bending process with the help of a wedge in the highest point of the bend can be pushed should. In the device according to DE-OS 29 23 769 the bending tool should also be the lateral one Guide for the side flanks of the U-shaped spacer strip form, the distance of the Guide surface for these sides flank the counter bearing tool cannot be changed because it is in one piece is executed.

Moreover, it is with the known bending devices possible, between those adjacent to the corner Legs to create obtuse angles, but acute angles are difficult to reach.

The invention has for its object a improved bending device (bending head) available to put, with the hollow profile strips under largely arbitrary, preselectable angles to the Corner of the adjacent leg bent to each other can be.

This object is achieved according to the invention in a device of the type mentioned by the characteristics of the characteristic Part of claim 1.

Advantageous embodiments the device according to the invention are the subject of the subclaims.

Fig. 1 einen Biegekopf in Seitenansicht,

Fig. 2 einen Biegekopf von links der Fig. 1 aus gesehen,

Fig. 3 eine Draufsicht auf den Biegekopf,

Fig. 4 eine Einzelheit des Biegekopfes im Bereich des Biegewiderlagers,

Fig. 5 einen Schnitt zu Fig. 4 und

Fig. 6 eine vergrößerte Einzelheit im Bereich des Widerlagers.

Advantages, features and details of exemplary embodiments of the invention result from the following description, in which reference is made to the attached drawings. Show it:

1 is a bending head in side view,

2 seen a bending head from the left of FIG. 1,

3 is a plan view of the bending head,

4 shows a detail of the bending head in the area of the bending abutment,

Fig. 5 shows a section to Fig. 4 and

Fig. 6 is an enlarged detail in the area of the abutment.

The bending device according to the invention of hollow profile strips 1 consists of a clamp 2 with a fixed jaw 3 and one opposite this movable jaw 4 (in Fig. 1 is the jaw 4 not shown). The moveable Jaw 4 is about guide pins 5 and 6, respectively are arranged in pairs, in the direction of Double arrow 7 (Fig. 2) displaceable, so that the mouth width the clamp 2 to the width of the to be bent Hollow profile bar 1 can be adjusted.

To actuate the movable jaw 4 in the direction of arrow 7 (Fig. 2) is at the fixed Jaw 3 pivotally supported Lever 8 provided. The lever 8 is over a Drawbar 9, which has a bearing 10 on the jaw 4 is pivotally supported; with the movable Clamping jaw 4 coupled. The swivel lever 8 is by a linear motor, not shown, e.g. a double-acting pressure cylinder actuated.

The bending device also has an abutment 20, which is used interchangeably in a carrier 21 is. For this purpose, a groove 23 is recessed in the carrier 21, into which the abutment 20 can be inserted with a sliding fit and there for example by a screw 24 is held.

The carrier 21 for the abutment 20 is on one Lever 25 mounted around a machine frame fixed Warehouse 26, i.e. a camp opposite the fixed one Clamp 3 of clamp 2 cannot move with the help of a linear motor 27, e.g. one double acting pressure medium cylinder, in the direction of Double arrow 28 from the one in Fig. 1 with continuous Lines shown operative position in the dash-dotted lines in Fig. 1 drawn standby position swiveling is.

In addition, the support 21 for the abutment 20, as shown in FIG. 2, to the plane of symmetry of FIG Terminal 2 vertically, namely in the direction of the in Fig. 2 shown double arrow 29 adjustable. Towards that the carrier 21 with guides 30 in one the lever 25 connected bracket 31 slidably guided. To adjust the carrier 21 and thus of the abutment 20 in the direction of the double arrow 29 is a linear motor, in the embodiment shown a double-acting pressure medium cylinder 32, provided, the piston rod 33 via a Drawbar 34 is coupled to the carrier 21.

In this way, the abutment 20 cannot only in one to the plane of symmetry of the jaw 2 parallel plane pivoted (double arrow 28), but also in one to the plane of symmetry of the terminal 2 vertical direction (double arrow 29) can be adjusted, so that the abutment 20 entirely from the Bending area can be moved out.

As FIGS. 1 and 2 and in particular FIG. 4 show, carries the abutment 20 at its front tip, that of two inclined surfaces 36, which are used for longitudinal extension of the bending abutment 20 a point Include angle, is formed, a bead-like Approach 35, which as shown in Fig. 4 shows the top surface of the hollow profile 1, which is in the terminal 2 between the Jaws 3 and 4 is clamped before Start of the bending process, namely when swinging in of the bending abutment 20 in its. Active position bulges somewhat.

In addition, the bending device according to the invention provided that the front end of the Abutment 20 and there on the inclined surfaces 36th subsequent, bead-shaped approach 35 something are narrower than the clear distance between the facing surfaces of the Jaws 3 and 4 of clamp 2. This is how the Side walls 40 of the hollow profile strip 1 to be bent supported from the inside during the bending process, as indicated in the section of FIG. 5. This is particularly the case when bending hollow profile strips 1 to spacer frame for insulating glass panes important because of the width of the side faces 40 of the hollow profile strip 1 also in the corner area if possible should not be reduced and these side surfaces 40 in the corner area not from that of the side surfaces 40 defined levels deviate inwards so that before the assembly of the Insulating glass panes on the spacer frame their side surfaces 40 adhesive and Sealing material also in the corner area, for tightness of insulating glass panes of considerable importance is applied in the full width.

To the abutment 20, in particular its beaded extension 35, opposite the jaw 2 and thus with respect to the axis 37 to soft the hollow profile strip 1 is bent to align correctly, is on the abutment 20 in the area of its front An angled stop surface on one end 41 provided with a level 42 on the fixed jaw 3 cooperates. If the stop surface 41 on the step 42 of the Clamping jaw 3 abuts, the axis 37 is at the front Provided end of the bending abutment 20, bead-shaped approach 35 properly aligned.

The bending device according to the invention also has a bending lever 50 with a bending attachment 52, which is pivotable about an axis that with the axis 37 of the bead 35 at the front end of the Bending tool 20 coincides when the abutment 20 is in its active position (the surfaces 41 rest on the surfaces 42 of the jaw 3). Of the The pivoting range of the bending lever 50 is not open limited to 90 ° shown in Fig. 1, but goes also beyond, so that after swinging out (Arrow 28) and sideways shifting (arrow 29) of the bending abutment 20 also acute angles between the two to those generated in the hollow profile strip 1 Corner 51 adjacent tavern of the hollow profile bar 1 can be bent.

For turning a hollow profile strip 1 to one Terminal 2 is opened at the corner and the hollow profile strip 1 placed on the upper guide pins 6 or from a conveyor to the guide pins 6 pushed. After closing the clamp 2, the inner surfaces of the jaws 3 and 4 are then on the side surfaces 40 of the hollow profile strip 1 on, the abutment 20 in its in Figs. 1 and 4 shown active position moves and arches the upward facing wall of the hollow profile strip 1 somewhat down one. Then it gets out of trouble 2 projecting part of the hollow profile strip 1 by pivoting of the bending lever 50 to form one Corner 51 pivoted upwards. Should the angle on the corner 51 be a sharp one, so the abutment 20 swung back and pulled back sideways, whereupon the bending continues to the desired angle becomes.

The bending lever 50 is then pivoted back; the jaw open and the hollow profile strip 1 advanced until the location of the hollow profile strip 1, in which another corner is to be made, opposite the bending tool is correctly aligned, Then, as described above, the next corner bent. This continues until a spacer frame with the desired number of corners 51 - usually there are four - is finished bent.

The bending device according to the invention is preferred for bending machines with upward pointing Contact surface for the angled parts of the hollow profile bar 1 suitable (e.g. DE-GM 87 05 796). There is Another advantage is that the abutment 20th in its standby position the removal of the Spacer frame is not hindered as it is in this arranged behind the abovementioned contact surface is.

The invention Bending device can also be used to manufacture of arches can be used in hollow profile strips. For this purpose, the hollow profile bar 1 is swung in Abutment 20 from a feed device the bending lever 50 is slightly pivoted upwards. The radius of curvature of the arc so produced in the hollow profile bar depends on how far the Bending lever 50 is pivoted upwards, i.e. from that, how high the e.g. made of plastic with little Friction coefficient of existing bending attachment 52 above the feed path (determined by the guide pins 6) stands.

Claims (13)

1. Device for bending hollow profiled bars (1) to form spacer frames for insulated glass panels with a clamp (2) which comprises a movable clamp jaw (4) which can be applied against one side surface (40) of the hollow profiled bar (1) to be bent, with a support surface (6) for the hollow profiled bar (1) in the area of the clamp, with a countersupport (20) associated with the clamp (2) around which bending is carried out, which abuts against the wall of the hollow profiled bar (1) later to form the internal corner and which is held on a carrier (21), which is displaceable both in or parallel to the plane of symmetry of the clamp (2) and also perpendicularly to this plane of symmetry in order to move the countersupport (20) away out of the bending plane, with a contact surface for the angled portions of the hollow profiled bar (1) and with a bending lever (50) pivotable relative to the clamp (2) in order to execute the bending procedure and which engages on the section of the hollow profiled bar (1) projecting beyond the clamp (2), characterised in that the clamp (2) has a second, stationary clamp jaw (3), in that the forward point of the countersupport (20) has a bead-like portion (35) defined by two oblique surfaces (36) enclosing an acute angle to the longitudinal extension of the countersupport (20) and being narrower than the clear spacing between the surfaces of the clamp jaws (3,4) facing one another and abutting on the side surfaces of the hollow profiled bar (1), and in that the displaceability of the countersupport is so formed that the forward point of the countersupport (20), when in its operative position, engages between the clamp jaws (3,4) of the clamp (2) to such an extent that the wall of the hollow profiled bar (1) later to form the internal corner is slightly curved inwards by the countersupport (20).
2. Device according to claim 1, characterised in that the carrier (21) for the countersupport (20) is pivotal about an axis (bearing 26) perpendicular to the plane of symmetry of the clamp (2).
3. Device according to claim 1 or 2, characterised in that the carrier (21) for the countersupport (20) is displaceably guided in a holder (31) perpendicularly to the plane of symmetry of the clamp (2).
4. Device according to one of claims 1 to 3, characterised in that the carrier (21) for the countersupport (20) is mounted on a lever (25), which is mounted on the device to pivot about an axis perpendicular to the plane of symmetry of the clamp (2).
5. Device according to claims 3 and 4, characterised in that the carrier (21) for the countersupport (20) is displaceably guided in a holder (31) secured to the lever (25) via preferably at least two guide pins (30) or track rods perpendicularly to the plane of symmetry of the clamp (2).
6. Device according to one of claims 2 to 5, characterised in that the countersupport (20) is secured on its carrier (21) so as to be replaceable.
7. Device according to claim 6, characterised in that the countersupport (20) on the carrier (21) is inserted with a sliding fit into a groove (23) provided on the carrier (21), and secured by means of an attachment means, e.g. a screw (24).
8. Device according to one of claims 1 to 7, characterised in that the stationary clamp jaw (3) of the clamp (2) is secured on the framework of the device.
9. Device according to one of claims 1 to 8, characterised in that, in order to guide the movable clamp jaw (4) relative to the stationary clamp jaw (3), track rods (5, 6) are provided, aligned perpendicularly to the plane of symmetry of the champ (2), which engage with a sliding fit in bores in one of the clamp jaws (3, 4), and in that track rods (6) simultaneously form the support surface for the hollow profiled strip-to be bent.
10. Device according to claim 9, characterised in that the movable clamp jaw (4) is coupled through a lever (8)-connecting rod (9)-drive to a linear motor., e.g. a hydraulic cylinder.
11. Device according to one of claims 1 to 10, characterised in that the stationary clamp jaw (3) has on its side facing the countersupport (20) a step (42), and in that the countersupport (20) has a countersurface (41) which engages in the step (42) when the countersupport (20) is in the operative position.
12. Device according to claim 11, characterised in that the bending lever (50) is pivotal about an axis (37) perpendicular to the plane of symmetry of the clamp (2), said axis (37) being coaxial with the axis of the bead (35) at the forward end of the countersupport (20), when the countersupport (20) is in its operative position.
13. Device according to one of claims 1 to 12, characterised in that the pivotal axis (bearing 26) of the lever (25) carrying the carrier (21) for the countersupport (20) is offset relative to the pivotal axis (37) for the bending lever (50).

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